Great App overall. The only problem I have is the same one echoed by a lot of other uses here, there absolutely needs to be a means of gagging or muting the stupid piano. I don't mind piano, but it's rather jarring compared to the sounds of nature that I really want to be listening to. For the love of pete, give us the option to adjust this, there is adjustments for EVERY OTHER SOUND. WHY CAN I NOT DISABLE THE PIANO? If it doesn't become an option, I will readjust my score, and it doesn't bode well for me purchasing any more products from this company. Please don't let something so simple ruin a great thing. Thanks.